1 Scope
2
Framework for the provision of the Broadband Connectionless Data Bearer
Service by the B-ISDN
2.1 Definition of the Broadband Connectionless Data Bearer Service
by the B-ISDN
2.1.1 Group addressing
2.2 Functional architecture
2.3 Connectionless server functional description
2.4 Interfaces
2.4.1 Connectionless Access Interface (CLAI)
2.4.2 Connectionless Network Interface (CLNI)
2.5 Connections
2.6 Protocols
2.7 Numbering and addressing
2.7.1 Individual Address (IA)
2.7.2 Group Address (GA)
2.7.3 Nested Group Address (NGA)
2.8 Traffic aspects
2.8.1 Access class enforcement
2.9 Operations and maintenance
2.9.1 Identification of OAM information flow
2.9.2 OAM-supported functions
2.9.3 OAM
mechanisms
2.9.4 Operations
2.10 Network charging capabilities
2.11 Interworking with non‑B-ISDN connectionless data
protocols
2.12 Interworking with connection-oriented data services
3
Layer service and functions provided by the Connectionless Layer
3.1 Layer service provided by the Connectionless Layer
3.1.1 Description of primitives
3.1.2 Definition of parameters
3.2 Connectionless Layer functions for user data transport
3.2.1 Preservation of CLL-SDUs
3.2.2 Addressing
3.2.3 Transit operator selection
3.2.4 QOS selection
3.3 Connectionless Layer functions for CL-OAM data transport
4
Protocol for the support of the Broadband Connectionless Data Bearer
Service by the B-ISDN at the UNI
4.1 Protocol stack
4.2 Layer service expected from the AAL
4.3 CLNAP protocol data unit structure and encoding
4.3.1 Destination-Address
4.3.2 Source-Address
4.3.3 Higher-Layer-Protocol-Identifier (HLPI)
4.3.4 PAD-Length
4.3.5 Quality of Service (QOS)
4.3.6 CRC Indication Bit (CIB)
4.3.7 Header Extension Length (HEL)
4.3.8 Reserved
4.3.9 Header extension
4.3.10 User-Information
4.3.11 PAD
4.3.12 CRC
4.4 Procedures
5
Protocol for the support of the Broadband Connectionless Data Bearer
Service by the B-ISDN at the NNI
5.1 Scope
5.2 Protocol stack
5.3 Layer service expected from the AAL
5.4 CLNIP Protocol Data Unit structure and encoding
5.4.1 Destination Address (DA)
5.4.2 Source Address (SA)
5.4.3 Protocol Identifier (PI)
5.4.4 PAD length
5.4.5 Quality of Service (QOS)
5.4.6 CRC Indication Bit (CIB)
5.4.7 Header Extension Length (HEL)
5.4.8 NGID
5.4.9 Reserved
5.4.10 Header Extension
5.4.11 HE Post-PAD
5.4.12 User-information
5.5 Error conditions
5.5.1
In the case of encapsulation
5.5.2 In the case of non‑encapsulation
6
Mapping between CLNAP and CLNIP
6.1 Application rules for encapsulation and non‑encapsulation
6.2 Encapsulation/decapsulation and non‑encapsulation
mechanisms
6.2.1 Derivation of the encapsulating CLNIP-PDU
fields
6.2.2 Derivation of the non‑encapsulating
CLNIP-PDU fields
7
Group Addressed PDU handling
7.1 Definitions
7.1.1 Group Address Agent (GAA)
7.1.2 Nested Group Address Agent (NGAA)
7.1.3 Architectural configurations for Group
Addressing
7.2 Centralized database approach
7.2.1 Transport
mechanism
7.2.2 Adding a new member to the group
7.3 Centralized database in conjunction with NGAAs
7.3.1 Centralized database in conjunction with
one level of NGAAs
7.3.2
Centralized database approach in conjunction with multiple levels of
NGAAs
7.3.3 Partial resolution before the GAA
7.4 Combination of group address resolution mechanism
Annex A – Encoding of the Destination Address field and Source Address field
Appendix I – List of acronyms
Appendix II – SDL diagrams
II.1 General description
II.2 Interaction between CLNAP entity and CLLR&R entity
II.3 Interaction between CLNIP entity and CLLR&R entity
Appendix III – Example of a network operating with enhanced group address
resolution
III.1 Introduction
III.2 The algorithm used for enhanced group address resolution
III.3 Example operation
III.3.1 Network configuration
III.3.2 Description of the group address
distribution process